Timothy J Cash Career Portfolio

Timothy J Cash

Career Portfolio

The early years 1980-1998

• NASA: HP41C Calculator flight units first Space Shuttle missions.• Sony 8 mm Camcorder: Nighttime Daytime Orbital Survey of Lightning• Trace Gas Analyzer: Spacelab Gas Chromatograph/Mass Spectrometer• Mark Products/Custom Cable: Cable Design Engineer• First optical fiber land seismic cable, harsh environment undersea cables• Litton Resource Systems: Coaxial cable: Cable TV• Western Instruments: Undersea umbilical/neutral tether/video system for Hydra-2500• ROV, first deep diving ROV in search for Oil 100 miles off Cape May, NJ at 2500 m depths• Western Geophysical/Guidance & Controls Liaison Officer: All Optical Towed Array (AOTA)• First all optical marine streamer for geophysical exploration in industry• Successful sea trial of five sensor streamer, 1985• Bendix Oceanics: Expert System for Cable Design, SPICE model, 50,000 lines FORTRAN• McDonnell Douglas : Lab Engineer: Sensors, FOG, Polarization Fading White Paper,• Mast Mounted Site Helicopter Electro-Optic Day/Night Vision System• Commonwealth Edison: Analyzed optical fiber network architecture, developed RFP• for private TBON fiber optic network using ComEd right-of-way, towers, road access,• and legacy electronics-nuclear, fossil and commercial real estate facilities.• Engineered/overbuilt 13 sites, 200 route miles of inside/outside plant engineering.• Consultant: Installed fiber optic networks for East Coast cities, design/lay out architecture using configuration spreadsheets based on vendor specifications.• PTII: Built/debugged working prototype Impedance Test Set for Telco Copper in the Loop, tested subscriber pair verifier replacement due to metallic test unit discontinuance.

The latter years 1998-2013• Boeing: Designed/Installed Delta-4 Optical Fiber Comms on Launch Complexes SLC-37/SLC-6• Environmental Tests FO Tool Kit: OFM1020 OTDR/28VDC Pwr Module/Flight Test Adapters• FO Tool Kit Payload flown on ISS mission 6A (4/19/01) with de-orbit (6/12/01)• Performed thermal analysis DNA Bioreactor as NASA Spinoff, written into NIH paper.• Consultant: Designed orbital hypersonic tether systems for multiple purposes.• Honeywell: Deployed TASS System as Field Engineer-US AOR, Air Bases, Iraq• NG Consultant: Scrubbed cable/connector drawings ASDS mini submarine.• SFO: Analyzed requirements for 300 man space station concept, 2004 Space Congress.• Consultant: Analyzed optical test set LabView, tested passive optical fiber components.• Consultant: Designed Star Tracker for satellite payload using Blackfin DSP.• Wrote chapter in book: Liftport Opening Space to Everyone-Space elevator deployment .• SEB Tech: Developed Test Metrics-active RFID Tag/Reader migration to open standards.• Ultra Electronics ATS: Engineer Microwave Network (L Band, X Band, Ku Band) Bahrain,• verified microwave path, loss budget, antenna radiation patterns, & sub contractor work.• Designed wireless microwave link Oil & Gas customer Northern Canada production site, reverse engineered IED threat, design & test of NASA Ground Station antennas (2x20m, 1x5.5m)• Supported TDRS Ground Station, Blossom Point, MD (2) 20 m SGL (1) 5.5 m EET Antenna.• Analyzed LTE user equipment, determined power distribution, created interference model LTEuser equipment onto GOES/GOES-R GEO/NPOES Polar satellite down links in 1675-1695 MHz band. Analyzed I/N=-10 dB ratios: multiple sites, determined exclusion zone radii.

Electro-Optic Umbilical Cable

Hydra-2500 ROVOptical Fiber Video Camera, neutral tetherplus umbilical optical cables to surface shipDiscoverer Seven Seas control shack

Optical Fiber Sensor Visibility Equation 7 as function (temperature, pressure)

Polarization Fading Analysis Optical Fiber Tow Cable: McDonnell Douglas

RF Test Station for Mast Mounted Site Electro-Optic Sensor

Commonwealth Edison (Chicago, IL) Telecommunications Backbone Optical Network(TBON) Dual OC-12 Ring with OC-3 Shelf DS1 Drop/Inserts:1992-1995Designed/Installed outside plant, inside plant, and SONET OC-3/OC-12 ADM’s,TM’s, CSU/DSU, OLIU cards, 1/0 DACS, and ICB for a SONET OC-12 network.Configured plug-in cards for channel banks, CSU/DSU, and DACS equipment.Familiar with DS0, DS1, and DS3 test set, telephone butt set, and break-out boxto certify DS0 and DS1 circuits for operation on the network through loop-back,continuity, BER, and optical testing (bi-directional OTDR and insertion loss).Provisioned voice switches for cross connect DACS onto a dual SONET ring.Provisioned legacy PBX phone switches down to the punch block, verified wiringPin-outs using the Fireberd 6000 BERT circuit analyzer.

DDM-2000 OC-3 Shelf

Dual Inner/Outer OC-12 Ring Interconnect Telco Systems Route-24 ICBI/F to DDM-2000 OC-3 Shelf

Commonwealth Edison (Exelon, Chicago, IL) Telecommunications Backbone Optical Network (TBON) Eleven Analog/Digital/Voice Circuit Test Methods were executed using Fireberd 4000 Bit Error Rate Test Sets, Hand Held TIMS, Butt Sets, RJ11, RJ45, V.24 cables, ABAM DS1 cables, and cross-connect panel interfaces. The circuits were a mix of half-duplex/full-duplex, legacy analog data, digital data, and voice. Some circuits were tested one direction ONLY, while other circuits were tested in BOTH directions. The requirement for a second DS0 Test Set and a second TIMS Test Set drove the tests, so we did not need to Loop the circuit back on itself at Far End “B” and test with a single Fireberd 6000 BER test set from end “A” only. This proved the SONET Network circuit paths end-to-end but did NOTaccommodate latency concerns. The tests were written in one day, and executedover a period of several weeks for several hundred mixed analog/digital circuits with circuit test slides available in back-up section.

MFS East Coast Optical Fiber Network Builds: White Plains, Albany, Buffalo,Boston, NYC, Newark, Philadelphia, Washington DCICG Optical Fiber Network Builds: Nashville, Birmingham, Charlotte

PT Industries International: Advanced Pair Test System Test HeadCopper in the Loop Central Office Impedance Test Set

Subscriber Pair Verifier (SPV) Functional Diagram

Type Connection: Single Function test Head

Type Connection: Multi-Function Test Set

I designed the HASTOL Orbital Hypersonic Tether for Dr. Robert Forward

Boeing Delta-4 Delta Operations Center (DOC) and SLC-37 Launch Complex

144 Count Single Mode Optical Fiber Cable Cross-SectionI installed this cable between DOC and SLC-37 CSB (9,000+ Ft)

144 Count Single-Mode Fiber (SMF) Cable route:Delta Operations Center to SLC-37 Common Support Building (CSB)

I installed optical fiber termination racks in DOC and SLC-37 CSB

Common Support Building (CSB) Communications Room,Location of Optical Fiber Cable Terminations

Space Launch Complex-6, Vandenberg AFB Delta-4 Launch Complex

Two 72 Count Single Mode Optical Fiber Cables were installed into existingroadbed between DOC and SLC-6 according to my recommendationsusing a diamond saw to defer disturbance of Native AmericanHallowed Ground

Remote Launch Control Center (RLCC) Building 8510 North VAFB toSLC-6 Delta-4 Launch Complex South VAFB. Two 72 Count SMF Cableswere cut and placed into existing road bed route using diamond saw(T Cash recommendation)

ISS FO Tool Kit OTDR Primary Fault Isolation

OTDR/Reel Patch CableFlight Test Adapters

OTDR Signature: FO I/F

Terminated Flight Links

Crew Bench Review 3/20/01 KSCT Cash present in photo

Tactical Automated Security SystemTASS System installed by T Cash at US AOR on Air Bases in Iraq

Advanced SEAL Delivery System Submarine US NavyScrub of cable/connector pinouts for production drawings

PM J-AIT STS Overview

Movement Tracking System

• Provides automatic detection of RFID Tags on board MTS trucks

• Low-powered RF interrogator integrated into MTS transceiver• Read data will be provided to RF-ITV-I Server

MTS Hub

RF-ITV-I Server

XML-based Feed• Position Reports• Text Messages• RFID Tag

Reads

Embedded RFID in MTS System Interoperability

Savi ANSI-256 Active RFID Tags

654 Tag 656-I Tag

ISO Container Tag ISO Container

Tagwith sensors

675-I Tag

Portable Deployment

Kit

650 Reader

SMR 650-210

673 TagEngine

ContainerSensor Tag

Intermec 751G/A With 650P

Docking station

with 654 adapter sleeve

T Cash was SME for PM J-AIT RFID-II Contract Products

Field Test Configuration:

Test ID ApplicationReader Height

Polling Cycle

50' (14 tags) 150' (14

tags)300' (22

tags)

Rest 654 | 674 |410

654 | 674 |410

654 | 674 |410

8 | 4 | 2 8 | 4 | 2 12 | 6 | 4

1A

Percent Tags Collected

Average Tags Collected

TIPS Read 20' Contnuous 97.14% 87.86% 71.36% 13.6 12.3 15.7TIPS Read 20' Contnuous 99.29% 83.71% 70.91% 13.9 11.72 15.6TIPS Read 20' Contnuous 98.57% 87.14% 69.09% 13.8 12.2 15.2TIPS Read 20' Contnuous 98.57% 88.57% 70.00% 13.8 12.4 15.4TIPS Read 20' Contnuous 97.86% 85.71% 71.36% 13.7 12 15.7

Average 98.29% 86.60% 70.55% 13.76 12.124 15.52

1B

Percent Tags Collected

Average Tags Collected

SM Read 20' Contnuous 97.86% 90.00% 81.36% 13.7 12.6 17.9SM Read 20' Contnuous 99.29% 90.00% 80.45% 13.9 12.6 17.7SM Read 20' Contnuous 97.86% 93.57% 80.91% 13.7 13.1 17.8SM Read 20' Contnuous 100.00% 92.14% 81.82% 14 12.9 18SM Read 20' Contnuous 97.86% 94.29% 81.36% 13.7 13.2 17.9

Average 98.57% 92.00% 81.18% 13.8 12.88 17.86

Tag Read Performance Distance from Reader

CommentsTag Type: 654/674/410Qty: 50Reader: SR-650Orientation: Vertical\Horizontal\Orthogonal

ANSI Read Test – Tags at Rest

Field Test Configuration:

Test ID Application Reader HeightPolling Cycle

# of Tags Collected @ 15 MPH

# of Tags Collected @ 25 MPH

# of Tags Collected @ 40 MPH

410 |654 |674 410 |654 |674 410 |654 |674 ISO & ANSI

2F Percent Tags Collected

Average Tags Collected

TIPS Read 20' Contnuous 80.00% 100.00% 40.00% 4 5 2TIPS Read 20' Contnuous 80.00% 100.00% 60.00% 4 5 3TIPS Read 20' Contnuous 80.00% 100.00% 80.00% 4 5 4TIPS Read 20' Contnuous 100.00% 80.00% 100.00% 5 4 5TIPS Read 20' Contnuous 100.00% 60.00% 100.00% 5 3 5

Average 88.00% 88.00% 76.00% 4.4 4.4 3.8

2GPercent Tags Collected

Average Tags Collected

SM Read 20' Contnuous 100.00% 40.00% 40.00% 5 2 2

SM Read 20' Contnuous 100.00% 100.00% 20.00% 5 5 1SM Read 20' Contnuous 80.00% 40.00% 20.00% 4 2 1SM Read 20' Contnuous 100.00% 80.00% 60.00% 5 4 3SM Read 20' Contnuous 80.00% 80.00% 60.00% 4 4 3

Average 92.00% 68.00% 40.00% 4.6 3.4 2

Dual Mode Read Test - Tags in motion

Comments

Speed (MPH)

Tag Type: 410\654\674\Qty: 1 \ 3 \ 1 Reader: Dual Mode SR-650Orientation: Vertical\Horizontal\Orthogonal

Bahrain Microwave Network: Seven Sites Across Island

NERA MW Radio: Multiple Sites (7) PTP Links

MW Tower, each site varies

T Cash Microwave Network ConsultantMW Network Path Loss AnalysisMW Antenna Pattern AnalysisAccess (Voice/Data) ChannelizationMW Test Requirements AnalysisVerified status and quality of microwave sub contractor work progress

Enter your System Information in Blue Boxes Only, do not change formula in Red Boxes.

INPUT DATA

Site Name Transmitter ReceiverAntenna Gain (dBi) 36.8 36.8 Frequency (MHz) 15000

Losses (Misc,Conn,TX,RX) 6.8 6.8 Path Length, PL (km) 5Loss/100 ft. 1.137 1.137 Path Length, PL (miles) 3

Cable Length (ft) 147.64 288.71Cable Loss 1.6786668 3.2826327

Antenna Height (Meters) 35 47.5 ModulationReceiver Sensitivity (dBm) -76.5

Transmit Power (milliwatts) 2000 DBPSK 9.6kb/s -85.5Transmit Power (dBm) 22 DQPSK 19.2kb/s -82.5

Effective Radiated Power (dBm) 50.3 8PSK 28.8kb/s -79.5Receive Threshold Criteria 1X10-8 16QAM 38.4kb/s -76.5

Calculation Free Space Path Loss = 36.575 + 20Log (D) + 20 Log (F)System Gain (dB) 156.8 Availability = 100%*(1-C * T * F* D3 * 10-f/10 * 10-4)

Free Space Path Loss (dB) 130.33 Maximum Radio Distance = 4*(Tx^0.5 + Rx^0.5)Fade Margin 26.49 dB Where:

Climate Factor (0.1 to 0.5) 0.30 D is Distance in between the antennas in milesTopology Factor (0.25 to 4.0) 0.25 F is Frequency in MHz

Availability (%) 99.999133%C is Climatic Factor ranging from 0.1 (mild & dry) to 0.5 (severe, humid)T is Topology Factor (ranging from 0.25 (mountainous) to 4.0 (flat land)

The Maximum Radio Distance Tx is Transmitter Height in Meters(MRD) between two sites based 51.23 km Rx is Receiver Height in metersupon the above data is:

How to use Path Calc ChartEnter the INPUT DATA - antenna gain, cable loss, cable length - etc,Enter the required Path Length (distance) into Cell F7

NB: The above figures are guidelines only Review Fade Margin (Cell C20) below 20 dB is unacceptableArWest cannot be held responsible for accuracy Increase/Decrease PL until Fade Margin is acceptable

Compare PL with MRD (Cell C26) Increase/Decrease Antenna Heights until MRD > PL

Typical Bahrain Microwave Network Free Space Path Loss Calculation

Parabolic Antenna AnalysisBold

Frequency = 1500.0 MHz; 20.0 cm

Reflector Diameter = 2.44 meters = 8.0 ft

Reflector Depth = 2.64 meters = 8.7 ft

Focal length = 0.14 meters = 0.5 ft; F/D =0.06

Feed Illumination Angle = -0.91 radian = -52 degrees

Illumination Efficiency = 50 %

Computed Antenna Gain = 7.3E+02 Ap = 28.7 dBi

Antenna Half Power Beamwidth = 8.4E-02 radian = 4.84 degrees

Minimum Drift Scan time = 1.9E+01 min = 1160.6 sec

Link Antenna Model Gain (dBi)Kay Height (m)

JOC Height (m)

Aperture (m)f (MHz) Depth (m)

KAY-JOC SP8-1.3NS (TR) 29.2 27.0 57.0 2.4 1500.0 2.6

Typical Bahrain Microwave Network Antenna Pattern Calculation

NASA TDRS Ground Station, Blossom Point, MD (2) 20 mtr SGL, (1) 5.5 mtr EET Antennas

SCNS Contract Principal Engineer (Orbital)RF Design, Test, InstallationFactory Acceptance TestSite Acceptance TestSite Construction and engineering support Assured quality of RF engineering work

NASA TDRS Ground Station, Blossom Point, MD (Assembly of 20 meter SGL Reflector Antenna

NASA TDRS Ground Station, Blossom Point, MD SGL 20 meter S-Band Feed

NASA TDRS Ground Station, Blossom Point, MD SGL 20 meter Ku-Band Feed

NASA TDRS Ground Station, Blossom Point, MD SGL 20 meter Subreflector

Determined LTE user equipment transmission power distribution.

NOAA GEO/Polar Sat D/L Interference Analysis from LTE Cellular U/L

Wallops Island Half-Annulus Exclusion Zone: 5 Km, I/N=-10 dB

NOAA GOES-R Sat D/L @Wallops Island, VA Interference from LTE Cellular U/LI/N=-10 dB

NOAA Site Exclusion Zones for GOES-R Down Links

NOAA Site Mitigation Zones for POES Polar Down Links:

Site Distance to mitigate for I/N = -10 dB (km)

Distance to mitigate for I/N = -20 dB (km)

Wallops Is., VA 288 375

Fairbanks, AK* 47 56

Suitland, MD 300 325

Miami, FL 360 374

Monterey, CA 84 100

Hawaii 23 96

Barrow, AK 300 308

Boulder, CO* 120 125

* No ducting (reverted to P.452 V12)

Mitigation distances extend from 23 to 300 Km due to coincidenceof beam pattern between LTE cellular U/L antenna and PolarGround Station D/L Antenna.Potential mitigation: Use of selective filters and remoteNOAA site locations for Down Link.

Sanity Check #1:Re-ran Miami analysis using:P%=50, I/N threshold=-10 dBResult: Distance to mitigate=44 Km (Alion)Assumption P%=50:NTIA distance to mitigate=46 KmIndustry distance to mitigate=39 KmThis shows the models are in agreement whenwe make similar assumptions.

Sanity Check #2:Study effects of P% using RFI from a single UEAssumptions: UE Ant Ht=1.5 m, NOAA Earth StationAnt Ht=12 m AGLPlot P% vs Distance to mitigate (Km)

Plot Path Loss (dB) vs distance to mitigate (Km)as P% is varied:

Longley-Rice Reliability & Confidence, or P.452 p% 0.01 0.1 5 50%

Distance km 10 8.4 9.2 4.6 -5.1dB

50 -2.6 -3.9 -10.2 -23.5dB

100 -3.2 -2.8 -4.8 -4.6dB

200 -11.2 -16.6 -5.3 -2.9dB

300 -21.8 -22.1 -3.2 -4.3dB

400 -21.2 -8.7 2.2 -5.3dB

500 -11.5 -5.2 2 -5.7dB

600 -6.1 0.9 1.5 -5.9dB

Average delta -8.7 -6.2 -1.7 -7.2dBOverall average delta -5.9 dB

Note: Data based on Visualyse built in propagation models, no terrain used (elevation = 0 for all points).

Propagation model comparison

Backup Slides